To be honest, prices are decent. Same as the B-Max4 III.
Yes, €550 is a lot for a factory kit, but knowing Yokomo, quality is top notch. So I don't expect a lot of problems there. I'd prefer to pay €550 for a top quality kit than 250 for a kit that has a lot more work and maintenance needed.
Let's go Yokomo! I don't know when prices will be up, but I guess it all will go fast once the worlds are done.